Process of producing gas and phosphatic fertilizer material.



Le] Ann I ALBERTO FRANCESCO IDIEIJACOUR'I, OI GENOA, ITALY, ASSIGNOR T SOCIEIA ANONIMA ITALIANA GIG. ANSALDO & 0., OF GENOA, ITALY.

PROCESS OF PRODUCING GAs AND PHOSPHATIC FERTILIZER MATERIAL.

No Drawing.

Producing Gas and Phosphatic Fertilizer Material, of which the following is a specification.

The present invention relates to the manufacture of gas from lignite, peat, Wood,

coal or coke, or other combustible fuels, and

is adapted, to be carried out at the place of production of these materials.

In the operation a flux is added to the material in the generator, for converting the ash of the coal into an easlly fusible slag, which becomes melted by the heat in the gas generator, so that it can be readily-withdrawn from the generator in fluidcondition.

It will readily be understood that the chemical nature of the ash of the fuel is of such a highly silicious nature that a calcareous flux is necessary to convert the ash into a readily fusible product, and it is an object of this invention, to produce a slag which will have useful properties.

By employing phosphorite, tricalcium phosphate, as the.flux,.I can produce a phosphate slag which has at least as much phosphorus as Thomas slag, and which when ground to a powder forms a satisfactory fertilizer raw material. Lime itself would be capable of use as a flux, but the slag produced by its use would not be suitable for use.

When using'tricalcium phosphate flux, the phosphoric acid is converted into a condition in which a large part of it is readily available, in the soil. A low grade phosv Specification of Letters Patent.

Patented Mm re, rare.

Application filed April 11, 1918. Serial No. 228,034.

phorite, low in phosphoric acid and lime, can be used if desired.

The lignite or other fuel used may contain pyrites or other sulfids, without serious detriment, the sulfur content thereof being oxidized andthen uniting with the phosphorite forming calcium sulfate which is carried away in the slag, hence the sulfur does not, to any large extent, form a constituent of thegas produced, and the qualities of the. latter hence are. not injured thereby. e

It is to be understood that the process can be carried out in any apparatus which is suitable for the purpose, and further that eitherair or steam may be used oxidizing agent.

I claim: 1. A process which comprises gasifying fuel in the presence of calcareous phosphatic material, in amount sufficient to flux the ash of the fuel, whereby gas is produced and a as the .phosphatic slag suitable for fertilizer produced.

2. A process which comprises gasifying lignite :in the presence of phosphatic rock to slag the ash of the lignite.

3. A process which comprises gasifying fuel containing relatively large amounts of sulfids, in the presence of sufficient calcium phosphate material to slag the ash of the fuel, and to unite with the bulk of the sulfur oxid to produce a slag suitable for use as fertilizer, and a combustible gas.

In testimony whereof I have hereunto signed my name in the presence of two witnesses.

f INQ- ALBERTO FRANCESCO lDlILAC()Ult'la Witnesses: I Y

DOMINICO Vomo, EMILIO OLIVARI. 

